5256221251 has 4 divisors (see below), whose sum is σ = 5283455752. Its totient is φ = 5228986752.

The previous prime is 5256221249. The next prime is 5256221281. The reversal of 5256221251 is 1521226525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5256221251 - 2¹ = 5256221249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5256221231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13616961 + ... + 13617346.

It is an arithmetic number, because the mean of its divisors is an integer number (1320863938).

Almost surely, 2^5256221251 is an apocalyptic number.

5256221251 is a deficient number, since it is larger than the sum of its proper divisors (27234501).

5256221251 is a wasteful number, since it uses less digits than its factorization.

5256221251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27234500.

The product of its digits is 12000, while the sum is 31.

The square root of 5256221251 is about 72499.8017307634. The cubic root of 5256221251 is about 1738.6995668207.

Adding to 5256221251 its reverse (1521226525), we get a palindrome (6777447776).

The spelling of 5256221251 in words is "five billion, two hundred fifty-six million, two hundred twenty-one thousand, two hundred fifty-one".